package com.xiaoxu.bbs.controller;

import com.xiaoxu.bbs.common.ReturnResults;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;

@RestController
@RequestMapping("/common")
public class CommonController {
    @Value("${bbs.basepath}")
    private String basePath;

    @PostMapping("/upload")
    public ReturnResults<String> upload(MultipartFile file) throws IOException {
        String originalFilename = file.getOriginalFilename();
        if (originalFilename == null) {
            return ReturnResults.error("文件名称错误");
        }
        String surfix = originalFilename.substring(originalFilename.indexOf("."));
        String filename = UUID.randomUUID().toString();
        filename = filename + surfix;
        File dir = new File(basePath);
        if (!dir.exists()) {
            dir.mkdirs();
        }
        file.transferTo(new File(basePath + filename));
        return ReturnResults.success(filename);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) throws IOException {

        FileInputStream fileInputStream = new FileInputStream(basePath + name);
        ServletOutputStream outputStream = response.getOutputStream();
        int len;
        byte[] bytes = new byte[1024];
        while ((len = fileInputStream.read(bytes)) != -1) {
            outputStream.write(bytes, 0, len);
            outputStream.flush();
        }
        outputStream.close();
        fileInputStream.close();
    }
}
